[Bug] get_root() hardcodes buffer 0

[PyDevC]

File: lua/model_cmp/context.lua:33

Introduction: vim.treesitter.get_parser(0, self.lang, {}) uses 0 (current buffer) instead of self.bufnr. This defeats the purpose of the instance field and will cause incorrect results if the context engine is ever called for a non-current buffer.

Detailed Description: Change 0 to self.bufnr.

[PyDevC]

Right now this is very low priority, I added the bufnr variable for features I am going to add in future.
This is for multi file request features where you can send a request from one and file and switch to other file to work on it.